Water is transported to a village in a tank pulled by a tractor. The combined mass of the tractor and the tank is 4100 kg when the tank is empty and
6500 kg when the tank is full of water.

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?